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首页> 外文期刊>Gait & posture >A new kinematic model of the upper extremity based on functional joint parameter determination for shoulder and elbow.
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A new kinematic model of the upper extremity based on functional joint parameter determination for shoulder and elbow.

机译：基于肩关节和肘关节功能关节参数确定的上肢运动学模型。

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摘要

A new upper extremity model is introduced for clinical application. It combines the advantages of functional methods to determine the joint parameters for the shoulder joint centre and the elbow axis location with the ease of a minimal skin mounted marker set. Soft tissue artefacts at the shoulder and upper arm are reduced via a coordinate transfer between dynamic calibration and the actual motion analyzed. A unique technical frame linked to markers on the forearm is defined for the humerus. The protocol has been applied to 50 subjects over a wide age range (5-85 years) and with varying physical status, proving clinical feasibility. Variability in joint centre localization in repeated measures was typically below 1 cm. Based on these estimated joint centre locations for shoulder and elbow, three shoulder joint angles together with elbow flexion and forearm pro-/supination were determined in a large set of static arm postures in 5 subjects. These were compared to synchronous universal goniometer measurements to analyse intra-tester, inter-tester, and inter-subject repeatability. Differences between the computed angles and the angles obtained directly with the goniometer remained below +/-5 degrees for joint angles up to 120 degrees and +/-10 degrees above 120 degrees.
机译：引入了一种新的上肢模型以用于临床。它结合了功能方法的优点，可通过最少的皮肤安装标记集来确定肩关节中心和肘部轴位置的关节参数。通过动态校准和分析的实际运动之间的坐标传递，可以减少肩部和上臂处的软组织假象。为肱骨定义了与前臂上的标记链接的独特技术框架。该方案已应用于50个年龄段（5-85岁），身体状况各异的受试者，证明了其临床可行性。重复测量中关节中心位置的变异通常低于1 cm。根据这些估计的肩膀和肘关节中心位置，在5名受试者的一组静态手臂姿势中确定了三个肩关节角度以及肘部弯曲和前臂俯仰/俯仰。将这些与同步通用测角仪的测量结果进行比较，以分析测试者内部，测试者之间和受试者之间的可重复性。对于最大120度的关节角和120度以上的+/- 10度，计算角度与直接用测角仪获得的角度之间的差值保持在+/- 5度以下。

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